Don't give Nintendo a moment's thought...the concept of the Wii is great because it helps get kids off the couch while playing video games & gets 'em on their feet, & It's a brilliant way to address the general 'obesity issue' we have (at least here in the US) Problem is, Nintendo products are always made to appeal to very young children & if you get it, you will always jones for better, more immersive games. (especially when the other consoles adopt the same 'get off your a**' technology.)
The XBox, although popular now will be obsolete soon enough
& the PS3, although currently unimpressive, will eventually have the last laugh
Consider the future, & chok up the higher price as an investment in said future